Thermal control device for liquid crystal display

Abstract

A light emission surface having a substantially single surface in a liquid crystal display 1 is designed so as to be opposite to a rear of a liquid crystal panel 2 or a rear of an optical member 5 through an air layer. Thus, it is possible to provide a liquid crystal display that can prevent a heat accumulation in a liquid crystal panel without any drop of brightness, and a light source device used in the liquid crystal display.

What is claimed is:  
     
       1. A liquid crystal display comprising: 
       a light source device which includes a flat light emission surface from which a light is emitted;  
       a liquid crystal panel which is arranged to be opposite to said light emission surface of said light source device; and  
       a spacing member which is formed between said light emission surface of said light source device and said liquid crystal panel to have a frame structure, and thermally separates said light source device and said liquid crystal panel,  
       wherein said spacing member includes at least one penetration hole formed therein that penetrates said spacing member.  
     
     
       2. The liquid crystal display according to  claim 1 , wherein said light source device includes a straight fall type structure in which said light emission surface comprises a light transmission plate having a predetermined transmissivity and is arranged on a light emission side of said light source device. 
     
     
       3. The liquid crystal display according to  claim 1 , 
       wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface.  
     
     
       4. A The liquid crystal display according to  claim 3 , wherein said heat radiation member and said light source device are integrated into a single unit. 
     
     
       5. The liquid crystal display according to  claim 1 , wherein said light source device includes a side light type structure in which said light emission surface comprises a light guide member through which a light is emitted. 
     
     
       6. The liquid crystal display according to  claim 5 , wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface. 
     
     
       7. The liquid crystal display according to  claim 6 , wherein said heat radiation member and said light source device are integrated into a single unit. 
     
     
       8. The liquid crystal display according to  claim 1 , wherein said spacing member comprises a frame-shaped body having an open portion, and wherein a plurality of penetration holes penetrate said spacing member. 
     
     
       9. The liquid crystal display according to  claim 1 , wherein said spacing member includes an inner circumferential surface and an outer circumferential surface, and wherein a plurality of penetration holes penetrate said inner and out circumferential surfaces. 
     
     
       10. A liquid crystal display comprising: 
       a light source device which includes a flat light emission surface from which a light is emitted;  
       a liquid crystal panel which is arranged to be opposite to said light emission surface of said light source device, wherein said light source device includes a straight fall type structure in which said light emission surface comprises a light transmission plate having a predetermined transmittivity and is arranged on a light emission side of said light source device; and  
       a spacing member which is formed between said light emission surface of said light source device and said liquid crystal panel to have a frame structure, and thermally separates said light source device and said liquid crystal panel,  
       wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface, and  
       wherein said heat radiation member has an open portion in a center and a penetration hole which extends in parallel to said light emission surface to penetrate said heat radiation member.  
     
     
       11. The liquid crystal display according to  claim 10 , wherein a shape of said penetration hole is tapered. 
     
     
       12. The liquid crystal display according to  claim 11 , wherein the shape of said penetration hole is determined based on a flow route of air in a space formed by said heat radiation member. 
     
     
       13. A liquid crystal display, comprising: 
       a light source device which includes a flat light emission surface from which a light is emitted,  
       wherein said light source device has a straight fall type structure in which said light emission surface comprises a light transmission plate having a predetermined transmittivity and is arranged on a light emission side of said light source device;  
       a liquid crystal panel which is arranged to be opposite to said light emission surface of said light source device; and  
       a spacing member which is formed between said light emission surface of said light source device and said liquid crystal panel to have a frame structure, and thermally separates said light source device and said liquid crystal panel,  
       wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface, and  
       wherein said heat radiation member includes an open portion in a center and a groove which is formed to extend from said open portion to an outer circumferential surface of said heat radiation member.  
     
     
       14. The liquid crystal display according to  claim 13 , wherein a shape of said groove is tapered. 
     
     
       15. The liquid crystal display according to  claim 14 , wherein the shape of said groove is determined based on a flow route of air in a space formed by said heat radiation member. 
     
     
       16. A liquid crystal display comprising: 
       a light source device which includes a flat light emission surface from which a light is emitted, wherein said light source device includes a side light type structure in which said light emission surface comprises a light guide member through which a light is emitted;  
       a liquid crystal panel which is arranged to be opposite to said light emission surface of said light source device; and  
       a spacing member which is formed between said light emission surface of said light source device and said liquid crystal panel to have a frame structure, and thermally separates said light source device and said liquid crystal panel,  
       wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface, and  
       wherein said heat radiation member includes an open portion in a center and a penetration hole which extends in parallel to said light emission surface to penetrate said heat radiation member.  
     
     
       17. The liquid crystal display according to  claim 16 , wherein a shape of said penetration hole is tapered. 
     
     
       18. The liquid crystal display according to  claim 17 , wherein the shape of said penetration hole is determined based on a flow route of air in a space formed by said heat radiation member. 
     
     
       19. A liquid crystal display, comprising: 
       a light source device which includes a flat light emission surface from which a light is emitted;  
       a liquid crystal panel which is arranged to be opposite to said light emission surface of said light source device, wherein said light source device includes a side light type structure in which said light emission surface comprises a light guide member through which a light is emitted; and  
       a spacing member which is formed between said light emission surface of said light source device and said liquid crystal panel to have a frame structure, and thermally separates, said light source device and said liquid crystal panel,  
       wherein said spacing member comprises a heat radiation member, and is mounted between said liquid crystal panel and said light emission surface, and  
       wherein said heat radiation member has includes an open portion in a center and a groove which is formed to extend from said open portion to an outer circumferential surface of said heat radiation member.  
     
     
       20. The liquid crystal display according to  claim 19 , wherein a shape of said groove is tapered. 
     
     
       21. The liquid crystal display according to  claim 20 , wherein the shape of said groove is determined based on a flow route of air in a space formed by said heat radiation member. 
     
     
       22. A liquid crystal display, comprising: 
       a light source device having a light emission surface;  
       an optical member placed opposite to the light emission surface of the light source device; and  
       a spacing member placed between the light source device and optical member,  
       wherein the spacing member has a frame structure with an open portion that thermally separates the light source device from the optical member, and  
       wherein said spacing member includes at least one penetration hole formed therein that penetrates said spacing member.  
     
     
       23. A method for controlling heat in a liquid crystal display, comprising: 
       mounting a liquid crystal panel in the display that is placed opposite to a light emission surface of a light source device within the display; and  
       mounting a spacing member between the light source device and liquid crystal panel,  
       wherein the spacing member includes a frame structure with an open portion that thermally separates the light source device from the liquid crystal panel,  
       wherein mounting of the spacing member comprises mounting a heat radiation member that includes an open portion in a center and a groove which is formed to extend from the open portion to an outer circumferential surface of the heat radiation member.  
     
     
       24. The method according to  claim 23 , wherein mounting of the spacing member comprises mounting a heat radiation member that includes an open portion in a center and a penetration hole that extends in parallel to the light emission surface to penetrate the heat radiation member. 
     
     
       25. The method according to  claim 23 , further comprising: 
       controlling radiation heat from the light source device with an inflow of air into a space of the frame structure.